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Strontium isotopes reveal Early Devonian to Middle Triassic carbonate sedimentation in the Sakar-Strandzha Zone, SE Bulgaria

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Abstract

We focused on the Sakar-Strandzha Zone (SASTZ) carbonate sequences in Bulgaria, where the Sakar, Subbalkanide and Strandzha Triassic facies types are presented. Strontium isotopic compositions of carbonate samples from the Triassic type section of the Sakar unit confirm an Early-Middle Triassic age of sedimentation consistent with biostratigraphic data, whereas the strontium isotopic compositions of other Sakar-type inferred Triassic sections suggest an Early Permian depositional age. The strontium isotopic compositions of a Strandzha-type Triassic carbonate sample are in agreement with Middle Triassic sedimentation. A few Subbalkanide-type Triassic carbonate samples from the northern and western SASTZ yielded strontium isotopic compositions indicating an Early Devonian sedimentation. The new results indicate late Paleozoic-early Mesozoic sedimentation, and require most of the Subbalkanide-type Triassic and some of the Sakar-type inferred Triassic carbonate sequences in the SASTZ to be revisited.

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References

  • Bedi Y, Vasilev E, Dabovski Ch, Ergen A, Okuyucu C, Doǧan A, Tekin UK, Ivanova D, Boncheva I, Lakova I, Sachanski V, Kuşcu I, Tuncay E, Demiray DG, Soycan H, Göncüoglu MC (2013) New age data from the tectonistratigraphic units of the Istranca “Massif” in NW Turkey: a correlation with SE Bulgaria. Geol Carp 64:255–277

    Article  Google Scholar 

  • Bonev N, Filipov P, Raicheva R, Moritz R (2019a) Timing and tectonic significance of Paleozoic magmatism in the Sakar unit of the Sakar-Strandzha Zone, SE Bulgaria. Int Geol Rev 61:1957–1979

    Article  Google Scholar 

  • Bonev N, Filipov P, Raicheva R, Chiaradia M, Moritz R (2019b) Detrital zircon and Sr isotopic constraints for a Late Paleozoic carbonate platform in the lower Rhodope thrust system, Pirin, SW Bulgaria. Geol Mag 156:2117–2124

    Article  Google Scholar 

  • Bonev N, Spikings R, Moritz R (2020) 40Ar/39Ar age constraints for an early Alpine metamorphism of the Sakar-Strandzha Zone, Bulgaria. Geol Mag 157:2106–2112

    Article  Google Scholar 

  • Bonev N, Filipov P, Raicheva R, Moritz R (2021) Evidence of late Paleozoic and Middle Triassic magmatism in the Sakar-Strandzha Zone, SE Bulgaria: regional geodynamic implications. Int Geol Rev. https://doi.org/10.1080/00206814.2021.1917008

    Article  Google Scholar 

  • Bonev N, Filipov P, Raicheva R, Moritz R (2022) Detrital zircon age constraints for Late Permian to Late Triassic clastic sedimentation in the northern-western Sakar-Strandzha Zone, SE Bulgaria. Int J Earth Sci 111:495–523. https://doi.org/10.1007/s00531-021-02125-6

    Article  Google Scholar 

  • Boyanov I, Kozhoukharov D, Goranov A, Kozhoukharova E, Ruseva M, Shilyafova Z (1992) Geological map of Bulgaria scale 1:100 000. Map sheet Haskovo. Committee of Geology and Mineral Resources, Geology and Geophysics Corp.

  • Boyanov I, Goranov A, Shilyafova Z, Ruseva M (1993) Geological map of Bulgaria scale 1:100 000. Map sheet Dimitrovgrad. Committee of Geology and Mineral Resources, Geology and Geophysics Corp.

  • Chatalov G (1961a) Triassische kristalline schiefer und magmagesteine zwischen Haskovo und Dimitrovgrad. C R Acad Bulg Sci 14:503–506

    Google Scholar 

  • Chatalov G (1961b) Triassic crystalline schists and granites imbedded in them in the area of Svetlina, Orlov Dol, Gradec and Madrec villages (north of the Sakar Mountain). Rev Bulg Geol Soc 22:80–86 (in Bulgarian, abstract in English)

    Google Scholar 

  • Chatalov GA (1985a) Contribution to the stratigraphy and lithology of the Paleozoic and Triassic rocks in Sveti Ilija Heights. Rev Bulg Geol Soc 46:53–70 (in Bulgarian, abstract in English)

    Google Scholar 

  • Chatalov GA (1985b) Contribution to the stratigraphy and lithology of the Sakar-type Triassic (Sakar Mountains, Southeastern Bulgaria. Rev Bulg Geol Soc 46:127–143 (in Bulgarian, abstract in English)

    Google Scholar 

  • Chatalov GA (1988) Recent developments in the geology of the Strandzha zone in Bulgaria. Bull Tech Univ Istanbul 41:433–465

    Google Scholar 

  • Chatalov G, Stefanov A (1966) New paleontological data for Triassic age of a part of the crystalline schists in Southeastern Bulgaria. Bull Geol Inst Bulg Acad Sci 15:269–277 (in Bulgarian, abstract in Russian and German)

    Google Scholar 

  • Chatalov G, Trifonova E (1985) Contribution to the stratigraphy of the Balkanide type Triassic in Sveti Ilija Ridge and Strandža Mountain (SE Bulgaria). Rev Bulg Geol Soc 46:312–324 (in Bulgarian, abstract in English)

    Google Scholar 

  • Chatalov GA (1990) Geology of the Strandzha zone in Bulgaria. Geologica Balcanica, Series Operum Singulorum 4, Publishing house of Bulgarian Academy of Sciences, Sofia, p 263 (in Bulgarian, abstract in English)

  • Chiaradia M, Müntener O, Beate B (2011) Enriched basaltic andesites from mid-crustal fractional crystallization, recharge, and assimilation (Pilavo Volcano, western Cordillera of Ecuador). J Petrol 52:1107–1141

    Article  Google Scholar 

  • Dabovski CN, Savov SS, Chatalov G, Shilyafov G (1993) Geological map of Bulgaria scale 1:100 000. Map sheet Edirne. Committee of Geology and Mineral Resources, Geology and Geophysics Corp.

  • Lakova I, Gocev P, Yanev S (1992) Palynostratigraphy and geological setting of the Lower Paleozoic allochthon in Dervent Heights, SE Bulgaria. Geol Balc 22:71–88

    Google Scholar 

  • Malyakov Y, Bakalova DG (1978) The Lower Permian near the village of Kondolovo Strandja Mountain. C R Acad Bulg Sci 31:715–718

    Google Scholar 

  • McArthur JM, Howarth RJ, Bailey TR (2001) Strontium isotope stratigraphy: LOWESS version. 3: best fit for marine Sr-isotope curve for 0–509 Ma and accompanying look-up table for deriving numerical age. J Geol 109:155–170

    Article  Google Scholar 

  • Pin C, Briot D, Bassin C, Poitrasson F (1994) Concomitant separation of strontium and samarium-neodymium for isotopic analysis in silicate samples, based on specific extraction chromatography. Anal Chim Acta 298:209–217

    Article  Google Scholar 

  • Tronkov D (1981) Stratigraphy of the Triassic system in parts of the western Srednogorie (West Bulgaria). Geol Balc 11:3–20 (in Bulgarian, abstract in English)

    Google Scholar 

  • Tzankov T (1983) Alpine deformations in the St. Iliiya Heights. Geotect Tectonoph Geodyn, Sofia, 16:19–42. (in Bulgarian, abstract in English)

  • Trifonova E, Chatalov G (1983) Microfacies of the Triassic carbonate rocks from the Teteven anticlinorium. Paleontol Stratigr Lithol, Sofia, 2:3–6

  • Tzankov T, Nakov R, Nedjalkov N, Angelova D, (1995) Explanatory note to the Geological Map of Bulgaria on scale 1:100 000. Nova Zagora map sheet. Committee on Geology and Mineral Resources, Geology and Geophysics AD, Sofia, p 86. (in Bulgarian, abstract in English)

  • Zacharieva-Kovacheva K, Ware S, Chatalov G (1964) Geological age of low metamorphic rocks north of Golyam Dervent, SE Bulgaria. C R Acad Bulgare Sci 17:749–751

    Google Scholar 

Download references

Acknowledgements

The study was supported by the Bulgarian National Science Fund project no. DN 04/6. We thank Franz Neubauer and an anonymous reviewer for their critical comments and valuable suggestions, as well as in-depth reading and commenting by the Editor-in-Chief, which altogether helped us to improve the manuscript.

Funding

This study was supported by Bulgarian National Science Fund (Grant No. DN04/6).

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Authors and Affiliations

  1. Department of Geology, Paleontology and Fossil Fuels, Sofia University “St. Kliment Ohridski”, 1504, Sofia, Bulgaria

    Nikolay Bonev

  2. Department of Earth Sciences, University of Geneva, 1205, Geneva, Switzerland

    Massimo Chiaradia & Robert Moritz

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  1. Nikolay Bonev
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  2. Massimo Chiaradia
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  3. Robert Moritz
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Correspondence to Nikolay Bonev.

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Bonev, N., Chiaradia, M. & Moritz, R. Strontium isotopes reveal Early Devonian to Middle Triassic carbonate sedimentation in the Sakar-Strandzha Zone, SE Bulgaria. Int J Earth Sci (Geol Rundsch) 111, 1307–1314 (2022). https://doi.org/10.1007/s00531-022-02181-6

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